For me the obvious answer is Jynx by default. But if I had to choose something else, I'd say Bruxish. It looks like a pageant mom that got transformed into a tropical fish.

Pikachu.

OVERRATED!

Slaking.

I would normally say Pikachu, but after my SwSh nuzlocke, it's definitely Clefable. Stupid thing Metronomed Sheer Cold (which hit despite only have a twenty-one percent chance to, I checked), Lock-on, and Horn Drill.

Voltorb comes to mind. It's literally just a Pokeball with eyes. Such a lazy design. If Voltorb suddenly disappeared from the list of Pokemon and went extinct forever, would anyone even notice? Would anyone even care? Tbh, I think there are a lot of Pokemon who are in the same boat, in that no one ever really remembers they even exist. You could wipe out quite a few of the old/useless ones and no one would probably notice.

Probably garchomp.
Fucking ugly, a pain to fight and was everywhere during my pokemon days.

Rowlet and Dartrix. Overrated ugly potato beak. Decidueye's cool though!

Hypno, Pikachu, Charizard, venusaur, Greninja, and mewtwo.

Mostly because one person

Whiscash,Bruxish,Vanilluxe

Probably Cleffairy or Cleffable. I dunno why but I find them more hideous than the actual “ugly” pokemon

Hypno

Useless in battle when Mewtwo and Alakazam are better Gen 1 Psychics, I'm sick and tired of seeing it in NSFW art, it's shiny sucks, and so does it's design. Hate to sound like a newgenner but Muna and Musharna executed the design and concept much better, AND theyve got cooler stats and shines. Hypno is literally useless and it's only purpose nowadays is appearing in NSFW

I hate Hypno for similar reasons, though mine persists on me being sick and tired of "Can you have Hypno hypnotize girls into fucking you?" when I try and meet new rp partners. At least I can ignore art easier, only really frustrating when all there is for that character is Hypno art :/

I have the opposite where ive had twenty people last year alone ask to see if they could be hypno to to hypnotize fuck me.
Also Hypno looks like a grouchy old man from across the steet

It looks like it'd be friends with Herbert the Pervert lol

When will Pokemon roleplayers realize that plenty of other, way hotter, Pokemon can use hypnotize on them too?

If I had to pick a least favorite, definitely Slacking. Others may be more boring or useless, but Slacking is either a humongous pain to battle or, mind-numbingly simple to battle.
I never feel joy when I see it